| Effect of plant probiotic bacteria and herbivore-induced plant volatiles (HIPVs) on life table parameters of two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) |
| Paper ID : 1105-3IICE (R2) |
| Authors: |
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Hosna Montazersaheb *1, AbbasAli Zamani1, Rouhallah Sharifi2, Maryam Darbemamieh2 1Department of Plant Protection, College of Agriculture, Razi University, Kermanshah, Iran 2Department of Plant Protection, College of Agriculture, Razi University, Kermanshah, Iran. |
| Abstract: |
| Two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is one of the most important polyphagous pests on vegetable and fruit crops. In this study, the effect of plant probiotic bacteria (Bacillus pumilus INR7), and some herbivore-induced plant volatiles (methyl jasmonate, methyl salicylate and 3-pentanol) were investigated on life table parameters of two-spotted spider mite using attached leaves of kidney bean, under laboratory conditions (25±1°C, 65±5% RH and a photoperiod of 16:8 h L:D). The life history data was analyzed using age-stage, two-sex life table. The longest and shortest mean longevity of females were 22.700±0.930 days on control treatment and 20.730±0.950 days on INR7. Similarly, the same parameter for males was longest (22.000±1.380 days) on 3-pentanol and shortest (20.830±1.780 days) on methyl salicylate, respectively. The lowest intrinsic rate of increase (rm) was obtained on methyl salicylate (0.167 ±0.009 per day), which was significantly lowere (P<0.05) compared with that on control treatment (0.193±0.010 per day). The lowest and highest values of net reproductive rate (R0) were obtained on INR7 (14.786±2.146 offspring) and methyl jasmonate (18.086±2.560 offspring), respectively, with no significant differences (P>0.05).The finite rate of increase (λ) ranged from 1.181±0.010 day-1 on methyl salicylate to 1.213±0.012 day-1 on control treatment with a significant difference (P<0.05).Mean generation time (T) on methyl salicylate (16.899±0.331 days) was significantly different from other treatments (P<0.05). The lowest and highest values of fecundity (F) was recorded on INR7 (25.880±2.635 eggs / female) and control treatment (31.600±2.739 eggs / female), respectively,. The results suggested that methyl salicylate could be considered as a resistance inducing material against Tetranychus urticae. |
| Keywords: |
| Life table, Tetranychus urticae, Plant probiotic bacteria, HIPVs, kidney bean |
| Status : Paper Accepted (Poster Presentation) |
